A newspaper reported that 28% of people say that some coffee shops are overpriced. The source of this information was a telephone survey of 100 adults.
Homework Answers
a) the pipupopula of our interest is adults
Adults
b) the sample obtained from population is 100 adults
100 adults
C) option B
d) given p = 0.28
n = 100
Alfa = 0.1
Z cri = 1.645
90% CI = (0.21, 0.35)
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